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In C programming, abs() is a built-in function that is used to return the absolute value of an integer. It stands for "absolute value" and allows the programmer to obtain the magnitude of a number without regard to its sign.
Here is the basic syntax of the abs() function
int abs(int x);
int x is the integer value whose absolute value is to be returned.
The abs() function returns the absolute value of x, which is the distance between x and zero on the number line. If x is positive, the function returns x. If x is negative, the function returns -x.
Here is an example of using the abs() function to obtain the absolute value of an integer
int x = -10;
int absoluteValue = abs(x);
printf("The absolute value of %d is %d\n", x, absoluteValue);
In this example, the x variable is assigned the value of -10. The abs() function is called with x as its argument, and the resulting absolute value is stored in the absoluteValue variable.
When this code is executed, it will display the following output on the console
The absolute value of -10 is 10
Note that the abs() function can only be used with integers. To obtain the absolute value of a floating-point number, the fabs() function can be used instead.
The abs() function is a useful tool for working with numerical values in C programming and can be used to perform mathematical calculations, comparisons, and other operations.